Can you change the color of waxed chalk painted upholstery?

I recently started chalk painting some upholstered couch cushions and used one layer of furniture wax to seal them. But now I am having a bit of DIY remorse and would like to change the color of the chalk paint. I have tried to clean the cushions hoping it would remove the wax but that didn't work. Should I just start over by adding more layers of paint and then wax or is there a way to safely remove the wax first?

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